Problem in display file in java applet embeded browser

Question

hi, i am facing problem to display the file from local drive in java applet embeded browser. here is the error message i get:
Exception loading file from path:java.security.AccessControlException: access denied (java.util.PropertyPermission user.dir read)
i think it should be the java security problem and i have try to get the solution from internet. i try to solve by using the fllowing method:
keytool -genkey -keyalg rsa -alias yourkey
keytool -export -alias yourkey -file yourcert.crt
javac yourapplet.java
jar cvf yourapplet.jar yourapplet.class
jarsigner yourapplet.jar yourkey
but the command prompt ask me to enter the keystore password. i try to enter any password. but i show me the error:
keytool error: java.io.IOException: Keystore was tampered with, or password was incorrect.
So may i know what is the problem actually?Thanks a lot.

Answer 1

Hi,
here is the sample coding :
import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;
import com.sun.j3d.utils.geometry.ColorCube;
import com.sun.j3d.utils.applet.MainFrame;
import com.sun.j3d.utils.universe.*;
import com.sun.j3d.utils.behaviors.mouse.MouseRotate;
import com.sun.j3d.utils.behaviors.mouse.MouseZoom;
import com.sun.j3d.utils.behaviors.mouse.MouseTranslate;
import javax.media.j3d.*;
import javax.vecmath.*;
import java.net.URL;
import java.net.MalformedURLException;
import org.web3d.j3d.loaders.VRML97Loader;
import com.sun.j3d.loaders.Scene;
public class SimpleVrml extends Applet implements ActionListener {
String           location;
String           initLocation;
Canvas3D     canvas;
SimpleUniverse     universe;
TransformGroup     vpTransGroup;
VRML97Loader     loader;
View          view;
Panel          panel;
Label          label;
BranchGroup     sceneRoot;
TransformGroup     examineGroup;
BranchGroup     sceneGroup;
BoundingSphere     sceneBounds;
DirectionalLight     headLight;
AmbientLight     ambLight;
TextField      textField;
Cursor          waitCursor;
Cursor          handCursor;
public SimpleVrml() {
initLocation="cylinder.wrl";     
     setLayout(new BorderLayout());
     GraphicsConfiguration config =SimpleUniverse.getPreferredConfiguration();     
     setLayout(new BorderLayout());
     canvas = new Canvas3D(config);
     add("Center",canvas);
     panel = new Panel();
     panel.setLayout(new FlowLayout(FlowLayout.LEFT));
     textField = new TextField(initLocation,60);     
     textField.addActionListener(this);
     label = new Label("Location:");
     panel.add(label);
     panel.add(textField);
     add("North",panel);
     waitCursor = new Cursor(Cursor.WAIT_CURSOR);
     handCursor = new Cursor(Cursor.HAND_CURSOR);
     universe = new SimpleUniverse(canvas);
     ViewingPlatform viewingPlatform = universe.getViewingPlatform();
     vpTransGroup = viewingPlatform.getViewPlatformTransform();
     Viewer viewer = universe.getViewer();
     view = viewer.getView();
     setupBehavior();
     loader = new VRML97Loader();
     gotoLocation(initLocation);
public void actionPerformed(ActionEvent ae) {
     gotoLocation(textField.getText());
void gotoLocation(String location) {
     canvas.setCursor(waitCursor);
     if (sceneGroup != null) {
     sceneGroup.detach();
     Scene scene = null;
     try {
     URL loadUrl = new URL(location);
     try {
          // load the scene
          scene = loader.load(new URL(location));
     } catch (Exception e) {
          System.out.println("Exception loading URL:" + e);
     } catch (MalformedURLException badUrl) {
     // location may be a path name     
     try {
          // load the scene
          scene = loader.load(location);
     } catch (Exception e) {
          System.out.println("Exception loading file from path:" + e);
     if (scene != null) {
     // get the scene group
     sceneGroup = scene.getSceneGroup();
     sceneGroup.setCapability(BranchGroup.ALLOW_DETACH);
     sceneGroup.setCapability(BranchGroup.ALLOW_BOUNDS_READ);
     // add the scene group to the scene
     examineGroup.addChild(sceneGroup);
     // now that the scene group is "live" we can inquire the bounds
     sceneBounds = (BoundingSphere)sceneGroup.getBounds();
     // set up a viewpoint to include the bounds
     setViewpoint();
     canvas.setCursor(handCursor);
void setViewpoint() {
     Transform3D viewTrans = new Transform3D();
     Transform3D eyeTrans = new Transform3D();
     // point the view at the center of the object
     Point3d center = new Point3d();
     sceneBounds.getCenter(center);
     double radius = sceneBounds.getRadius();
     Vector3d temp = new Vector3d(center);
     viewTrans.set(temp);
     // pull the eye back far enough to see the whole object
     double eyeDist = 1.4*radius / Math.tan(view.getFieldOfView() / 2.0);
     temp.x = 0.0;
     temp.y = 0.0;
     temp.z = eyeDist;
     eyeTrans.set(temp);
     viewTrans.mul(eyeTrans);
     // set the view transform
     vpTransGroup.setTransform(viewTrans);
private void setupBehavior() {
     sceneRoot = new BranchGroup();
     examineGroup = new TransformGroup();
     examineGroup.setCapability(TransformGroup.ALLOW_CHILDREN_EXTEND);
     examineGroup.setCapability(TransformGroup.ALLOW_CHILDREN_READ);
     examineGroup.setCapability(TransformGroup.ALLOW_CHILDREN_WRITE);
     examineGroup.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
     examineGroup.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
     sceneRoot.addChild(examineGroup);
     BoundingSphere behaviorBounds = new BoundingSphere(new Point3d(),
          Double.MAX_VALUE);
     MouseRotate mr = new MouseRotate();
     mr.setTransformGroup(examineGroup);
     mr.setSchedulingBounds(behaviorBounds);
     sceneRoot.addChild(mr);
     MouseTranslate mt = new MouseTranslate();
     mt.setTransformGroup(examineGroup);
     mt.setSchedulingBounds(behaviorBounds);
     sceneRoot.addChild(mt);
     MouseZoom mz = new MouseZoom();
     mz.setTransformGroup(examineGroup);
     mz.setSchedulingBounds(behaviorBounds);
     sceneRoot.addChild(mz);
     BoundingSphere lightBounds =
     new BoundingSphere(new Point3d(), Double.MAX_VALUE);
ambLight = new AmbientLight(true, new Color3f(1.0f, 1.0f, 1.0f));
ambLight.setInfluencingBounds(lightBounds);
ambLight.setCapability(Light.ALLOW_STATE_WRITE);
sceneRoot.addChild(ambLight);
headLight = new DirectionalLight();
headLight.setCapability(Light.ALLOW_STATE_WRITE);
headLight.setInfluencingBounds(lightBounds);
sceneRoot.addChild(headLight);
     universe.addBranchGraph(sceneRoot);
public static void main(String[] args) {
new MainFrame(new SimpleVrml(), 780, 780);
cylinder.wrl :
#VRML V2.0 utf8
# A cylinder
Shape {
appearance Appearance {
material Material { }
geometry Cylinder {
height 2.0
radius 1.5
view.html:
<html>
<applet code="SimpleVrml.class" width=600 height=600>
</applet>
</html>
error msg that i get :
Exception loading file from path:java.security.AccessControlException: access denied (java.util.PropertyPermission user.dir read)
i can display the wrl file in applet itself but i can't display in the browser.is it any problem with my code?Urgent, please help me. Thanks.